EP1032488A1 - Dispositif de serrage pour un etabli - Google Patents

Dispositif de serrage pour un etabli

Info

Publication number
EP1032488A1
EP1032488A1 EP98952868A EP98952868A EP1032488A1 EP 1032488 A1 EP1032488 A1 EP 1032488A1 EP 98952868 A EP98952868 A EP 98952868A EP 98952868 A EP98952868 A EP 98952868A EP 1032488 A1 EP1032488 A1 EP 1032488A1
Authority
EP
European Patent Office
Prior art keywords
clamping
jaws
workbench
supplementary
jaw
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP98952868A
Other languages
German (de)
English (en)
Inventor
George Hayday
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hayday Cynthia
Original Assignee
Hayday Cynthia
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from GBGB9724648.2A external-priority patent/GB9724648D0/en
Application filed by Hayday Cynthia filed Critical Hayday Cynthia
Publication of EP1032488A1 publication Critical patent/EP1032488A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B5/00—Clamps
    • B25B5/06—Arrangements for positively actuating jaws
    • B25B5/10—Arrangements for positively actuating jaws using screws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B5/00—Clamps
    • B25B5/14—Clamps for work of special profile
    • B25B5/142—Clamps for work of special profile for windows and frames
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25H—WORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS
    • B25H1/00—Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby
    • B25H1/08—Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby with provision for attachment of work holders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25H—WORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS
    • B25H1/00—Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby
    • B25H1/10—Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby with provision for adjusting holders for tool or work

Definitions

  • This invention relates to clamping workbenches such as those of the type sold under the Trade Mark WORKMATE and m particular to a secondary clamp for attachment thereto.
  • the "Workmate” and similar portable and collapsible clamping workbenches are now well known. Briefly, they comprise two elongate jaws supported on folding legs, interconnected by threaded rods extending transversely to the longer dimension of the aws and rotatable by handles to enable the jaws to be relatively moved, towards or away from one another.
  • the two jaws When closed, the two jaws constitute a workbench, but by opening the jaws a workpiece can be clamped therebetween, for example for sawing or planing or otherwise working on the workpiece.
  • a series of apertures have therefore been provided m the two jaws to accommodate pegs at differing distances from the inboard edges of the two jaws.
  • a supplementary clamping jaw means is provided, adapted to be operatively joined to the main pair of jaws so as to be movable in a direction transverse to the direction of relative movement of the main jaws when the latter are relatively moved by the workbench drive means.
  • the supplementary jaw is adapted to extend across at least in part both of the two main jaws.
  • It may extend perpendicularly to the main jaws or at an acute angle thereto.
  • the supplementary jaw is securable to the main jaws through a linkage which transmits the motion of the main jaws into a direction perpendicular to that motion, to produce the desired movement of the said supplementary jaw.
  • a second supplementary jaw may be provided, adapted to be fitted to the workbench so as similarly to extend transversely of the main jaws, but spaced from the first supplementary jaw, to allow a workpiece to be clamped between the two supplementary jaws in response to operation of the workbench drive means .
  • the second supplementary jaw may be adapted to be fixed to one of the two main jaws and be slidable relative to the other so as to permit the full relative movement of the two main jaws.
  • the second supplementary jaw may be adapted to be pivotallv joined to both of the two main jaws at one end of the workbench whilst the first supplementary jaw is attached to the main jaws near the other end of the workbench, and when both supplementary jaws are so positioned, relative movement between the two supplementary jaws is achieved by operating the workbench drive means at the said other end of the workbench so as to increase or decrease the separation between the two main jaws at that said other end of the workbench only.
  • Each supplementary jaw may include a retaining lug for engaging the underside of a main jaw to prevent the supplementary jaw from lifting off the main jaws.
  • Each retaining lug may comprise an L-shaped bracket designed to accommodate the thickness of a main jaw between it and the underside of the supplementary jaw, or may comprise a member mounted at a distance below the supplementary jaw so as to extend below one or both of the main jaws.
  • the member may be movable relative to the underside of the supplementary jaw as by sliding or pivoting to assist in positioning the supplementary jaw or the main jaws.
  • supplementary jaw or jaws is/are located above the main jaws.
  • the main jaws include openings into which pegs will fit, and the stop means may comprise one or more such pegs having enlarged heads to prevent them from passing completely through the openings, or the stop means may comprise a second supplementary jaw as aforesaid.
  • the linkage members for mounting the supplementary jaw or jaws to the main jaws may include pegs adapted to be fitted into the stop peg openings in the main jaws.
  • each linkage members may be cut away to define an opening into which the enlarged head of a conventional peg can be received, the latter serving as an end stop for the linkage member.
  • One preferred arrangement comprises a supplementary jaw having an elongate slot in one longer edge thereof for receiving an end of a linkage arm which is secured therein for sliding and pivoting movement relative to the supplementary jaw, the other end of the linkage arm includes a peg adapted to be a push fit in an opening in one of the main workbench jaws, and the supplementary jaw includes a retention device in the form of an L-shaped bracket, one limb of which is spaced from its underside and defines therewith a channel which is adapted to engage the inner facing edge of the other of the main workbench jaws .
  • the spacing between the underside of a supplementary jaw and the retention device lug may be adjustable to accommodate different thicknesses of workbench jaw.
  • a secondary clamp for attachment to a collapsible clamping workbench sold under the Trade Mark WORKMATE comprising a supplementary jaw and means for operatively connecting the supplementary jaw to the workbench jaws, whereby when an operating handle for moving one workbench jaw relative to the other is rotated, relative movement is effected between the said supplementary jaw and the main workbench jaws in a direction transverse to the direction of relative movement of the main workbench jaws, to enable a workpiece laid on the main workbench jaws between the supplementary jaw and stop means attached to one or both of the workbench jaws, to be clamped therebetween .
  • the stop means may comprise conventional "WORKMATE" pegs fitted into openings in the main workbench jaws or an elongate stop means extending transversely of the two main workbench jaws remote from the placement of the supplementary jaw.
  • the said elongate stop member may be formed from a single elongate strut adapted to be fitted to the main workbench jaws or may include two shorter elongate struts, one attached to one workbench and the other attached to the other workbench jaw and aligned as required.
  • the linkage comprises a pair of levers, one for attachment to each of the workbench jaws, each lever having at one end a cylindrical peg for pivotally fitting it into a circular peg stop receiving opening in one of the workbench jaws, and remote therefrom means for effecting a pivoting and sliding connection with the transverse supplementary jaw.
  • the axis of rotation of the two levers are similarly moved apart or together, the levers rotate relative to the workbench jaws about their respective peg axes, and this causes the transversely extending secondary jaw member to move in a direction at right angles to the length direction of the workbench jaws since the remote ends of the levers are held captive therein.
  • each of the levers By providing an elongate slot for the remote end of each of the levers, these can either diverge or converge between the supplementary jaw and the workbench jaws, thereby acting in either an outward or an inward sense, so altering the direction of movement of the supplementary jaw in response to the opening and closing of the workbench jaws.
  • one supplementary jaw member is fitted to the workbench jaws at one end thereof and conventional peg stops are inserted into holes in the workbench jaws at or near the other end thereof and, as there normally exist a series of holes for peg stops in each workbench jaw, different positions are possible for both the fixed stops and the movable supplementary jaw, by utilising different pairs of the holes in the workbench jaws for the peg stops and pivot pegs of the levers .
  • an elongate stop member is provided, adapted to abut the peg stops and extend across the gap between the workbench jaws, to provide better support for the edge of a workpiece .
  • the elongate stop member may include a bracket to engage the inner edge of one of the workbench j aws or an elongate retaining member spaced therefrom to protrude below one or both of the main jaws, to prevent the member from lifting when under pressure.
  • the elongate stop member may include a peg for fitting into an opening in one of the workbench jaws.
  • a second peg is provided which is slidable relative to the elongate stop member to accommodate relative movement of the workbench jaws.
  • two similar supplementary jaws are provided, for mounting at opposite ends of the workbench, so that when so mounted relative movement of the workbench jaws results in orthogonal movement of each of the two supplementary jaws, albeit in an opposite sense, so as to clamp or release their grip on a workpiece located therebetween.
  • the length of the workbench jaws is significantly greater than the maximum distance between the outermost edges thereof when opened to their maximum extent, measured perpendicularly to their length. Accordingly when a supplementary jaw and cooperating end stop (such as a second supplementary jaw) are fitted into holes in the workbench jaws at the extreme ends of the jaws, and thereby spaced to the widest possible extent, the space available for a workpiece therebetween is substantially greater than the corresponding spacing available in the conventional transverse sense between stops inserted in the openings provided in the main workbench j aws .
  • transverse supplementary jaw is attached to one end of a workbench and is movable transversely thereto, a single handed clamping action is made possible for the user, which is especially advantageous for repetitive work, since it is only necessary to turn the workbench jaw drive handle at the said one end of the jaws.
  • the two levers joining a supplementary jaw to the two workbench jaws may cross over at a point between their ends and be pivotally attached at the crossing point to form a scissors action.
  • the presence of the primary workbench jaws below the supplementary jaw means that a narrow workpiece clamped by the supplementary jaw does not fall between the supplementary jaw and the opposite clamping device (either stop pegs or a second supplementary jaw) when the clamping force exerted by the supplementary jaw is removed.
  • the pivoting linkage between the workbench jaws and supplementary jaw may be arranged so that the supplementary jaw moves in a direction to clamp a workpiece when the workbench jaws are moved together and vice versa.
  • the connection between the upper member and the restraining device may extend through an opening in a workbench jaw or around the rear edge of the jaw or more preferably across the clamping face of the workbench jaw, and to this end the connection is preferably formed from a thin structural member such as a metal strip so that the workbench jaws can be almost closed if desired.
  • a supplementary clamping jaw for fitting above the workbench jaws of a clamping workbench includes drive means for shifting the supplementary clamping jaw at right angles to the direction of clamping movement of the workbench jaws in response to inward or outward movement thereof, wherein the supplementary clamp jaw drive is adapted to fit between the opposed clamping faces of the workbench jaws.
  • the supplementary clamp jaw drive may comprise lever means acted on by spring means to engage a clamping face of one of the workbench jaws.
  • Two such sprung lever means may be provided for engaging both opposed clamping faces of two workbench jaws to provide a symmetrical arrangement .
  • a retaining member may extend from below the supplementary clamping jaw to engage the underside of one of the workbench jaws .
  • Two such retaining members may be provided to form a symmetrical arrangement for engaging the undersides of both workbench j aws .
  • the retaining members may simply comprise elongate lips protruding laterally of a vertical support which latter is adapted to extend between the two clamping faces of the workbench j aws .
  • the vertical support is preferably a thin wood, plastics or metal member.
  • One of the workbench jaw clamping faces may be formed with a plurality of pockets spaced apart therealong and adapted to accept and retain an end of a supplementary jaw drive lever.
  • the pockets may be formed by openings or slots in the jaw surface or may be a ratchet attached to or embedded at least in part in the jaw surface, or a strip of wood or metal or plastics material having openings formed therein and fitted to the edge of the jaw, or a frame adapted to fit snugly over the whole workbench jaw may be provided, the outer surface of the edge which overlies the clamping face of the jaw having formed therein the openings or pockets as specified.
  • means may be provided to clamp or otherwise secure the frame to the workbench jaw.
  • an improved peg stop therefor, having an enlarged head, wherein the peg is mounted asymmetrically relative to the head.
  • the head By asymmetrically mounting the head relative to the peg, the latter can be rotatably located m an opening in the workbench and rotated therein to provide a variation m the offset between the peg axis and the workpiece engaging face of the head.
  • the peg and opening may be cylindrical to allow full rotation or may be square or triangular m cross-section allowing for a correspondingly limited number of orientations to be achieved by lifting the peg and reinserting it.
  • the invention also lies in a clamping workbench having relatively movable primary clamping aws when fitted with at least one supplementary clamping jaw means as aforesaid, and at least one fixed stop for clamping a workpiece therebetween above the primary clamping jaws, the orthogonal movement between the supplementary clamp jaw and the fixed stop required to effect the said clamping of the workpiece therebetween being effected by a translation of the movement of the primary clamping jaws of the workbench.
  • the invention also lies in a clamping workbench having relatively movable primary clamping jaws when fitted with two supplementary clamping jaws as aforesaid, mounted so as to produce opposed motion of the supplementary clamping jaws in response to the said relative movement of the primary clamping jaws, the supplementary clamping jaws being spaced apart along the length of the primary clamping jaws to permit a workpiece to be located therebetween and clamped up by effecting the usual movement of the primary clamping jaws of the workbench.
  • the invention also lies in a clamping workbench having two relatively movable primary clamping jaws having openings therein to receive peg stops, when fitted with at least one offset peg stop member as aforesaid, with its peg in one of the peg receiving apertures and rotatable into at least two positions so as to provide two different spacings between a clamping face of the offset peg and at least one other peg stop or supplementary clamping jaw as aforesaid.
  • the invention also lies in a clamping workbench as aforesaid having two relatively movable primary clamping jaws in combination with at least one supplementary clamping jaw means as aforesaid, and at least one offset peg stop as aforesaid.
  • the invention also lies in a kit of parts comprising a clamping workbench having two relatively movable primary clamping jaws, at least one supplementary clamping jaw means adapted to be secured to one or both of the primary clamping jaws to translate normal relative movement therebetween into an orthogonal clamping movement, and at least one offset stop peg adapted for insertion into a peg receiving opening of the primary jaws and at least one conventional peg stop also adapted to be fitted into a peg retaining opening in the primary jaws of the workbench.
  • Figure 1 diagrammatically shows in plan view a secondary clamp incorporating one aspect of the invention, and applied to a clamping workbench;
  • Figure 2 is a diagrammatic elevation of the modified workbench of Figure 1, in which the workbench legs are omitted;
  • Figure 3 is a plan view of a modification of the arrangement of Figure 1 ;
  • Figure 4 illustrates modified stop members embodying the third aspect of the invention used in place of standard pegs in conjunction with a secondary clamp embodying the first aspect of the invention
  • Figures 5A and 5B show the detail of a slot connection as incorporated into the secondary clamp of Figures 1 and 2 ;
  • Figures 6A to 6E show further detail of the slot connection of Figure 5 ;
  • Figure 7 is a perspective view of the clamping jaw, constructed in accordance with Figures 5 and 6, but in which the ends of the levers 44, 46 are adapted to fit around standard workbench peg stops;
  • Figure 8 is a similar perspective view to that of Figure 7 in which the lever ends are formed with integral pegs for fitting directly into peg holes in the main workbench jaws;
  • Figures 9A and 9B show how a retaining member for bridging below the main workbench jaws can be rotated to facilitate the fitting of the jaw of Figure 8 to a workbench;
  • Figure 10 illustrates an alternative clamping jaw assembly adapted for mounting between the main jaws of a clamping workbench
  • Figure 11 illustrates a further alternative clamping jaw assembly adapted for mounting between the main jaws of a clamping workbench
  • Figure 12 shows a modification of one of the inside faces of the main jaws of the clamping workbench to facilitate the locking in place and effecting of the orthogonal movement of the secondary clamping jaw;
  • Figure 13 shows how the locking modification of the embodiment shown in Figure 12 can be applied to both faces of the main jaws of the workbench;
  • Figure 14 illustrates how a ratchet surface may be provided in the inside face of a main jaw of a workbench
  • Figure 15 shows an alternative device to that of Figure 14
  • Figure 16 shows a further alternative device to that of Figure 14;
  • Figure 17 is a perspective view of the underside of an improved peg stop for use with a clamping workbench
  • Figures 18A, 18B and 18C show how three different clamping distances from another stop can be obtained by differently positioning the peg stop of Figure 17;
  • Figure 19 is a perspective view of another secondary clamp which may be used with conventional peg stops or another similarly constructed secondary clamp pegged to the main workbench jaws;
  • Figure 20 shows how the spacing between a retaining lug and the secondary clamp can be adjusted.
  • the workbench jaws generally in the form of two flat elongate boards 10 and 12 each have a series of holes 14, 16 along their lengths, respectively adjacent their inner and outer longitudinal edges.
  • the holes 14, 16 can receive pegs 18, 20, 22 and 24 shown in dotted outline, enabling a workpiece 26 (also shown in dotted outline) to be clamped between the pegs (18, 20, 22 and 24) as the jaws 10, 12 are moved together.
  • Movement of the jaws 10, 12 is enabled by two elongate screws 28, 30 extending transversely of the jaws 10, 12 and operable by handles 32, 34.
  • the secondary clamp comprises an elongate member 36 of timber, metal or possibly plastics material, orientated on the workbench transversely to the jaws 10, 12.
  • a second elongate member 38 abuts against the two workbench pegs 40, 42 using any selected pair of workpeg holes from the two series of holes 14, 16.
  • Member 36 is linked to the jaws 10, 12 by means of two levers 44, 46, the ends of which engage square workbench pegs 48, 50 which are secured in holes in the two jaws 10, 12 and pivot relative to the aws.
  • the other ends are held captive m slots 52, 54 the member 36 as later described m detail with reference to Figures 5A and 5B .
  • the jaw 36 may be linked to the mam jaws 10, 12 using any selected pair of workpeg holes, one selected from each of the two series of holes 14, 16 in the two ma aws.
  • the member 36 is moved parallel to the length direction of the jaws 10, 12 le towards or away from stop 38, when the jaws 10, 12 are moved towards one another by rotating one or both of the handles 32, 34.
  • the members 36, 38 thus constitute a movable jaw and a fixed jaw of a secondary clamp with a clamping action at right angles to that afforded by the jaws 10, 12.
  • the secondary clamp formed by movable clamping jaws 36 and fixed stop 38 has a one-handed action m that jaw 36 will move towards or away from 38 by rotating handle 34 alone, whereas both handles 32 and 34 must be rotated to properly operate the main clamping jaws 10 and 12.
  • each member 36, 38 is connected to a respective restraining member beneath the ma workbench jaws 10, 12.
  • jaw 36 is shown joined to a restraining member 56 by a connecting member 58 which is relatively slim so that the jaws 10, 12 can still be moved close together and thus enable the range of movement transmitted to the jaw 36 is only minimally reduced.
  • Figure 3 shows a modification m which the levers 44, 46 are differently arranged, so that the jaw 36 moves towards the fixed stop 38 when the separation between the jaws 10, 12 is increased.
  • Figure 4 shows how elongate stop 38 may be formed from two stop members 38A and 38B, fitted into workpeg holes at one end of the mam jaws 10 and 12 with the supplementary clamp 36 fitted at the other end.
  • Figures 5A and 5B show m detail the manner in which a slot connection is effected between the levers 44, 46 and the jaw 36.
  • the member 36 can be constructed m three layers, namely a complete top layer 60, an intermediate layer 62 and a bottom layer 64.
  • the latter includes a narrow elongated slot 66 which receives the lower end of peg 68 fitted so as to protrude below its lever (44 as shown) thus forming a T-slot connection.
  • the intermediate layer 62 is cut away to define the slot 52, and the ends thereof are curved so as to match the curvature of the rounded end 70 of the lever 44.
  • the outer lever 46 is similarly received in the other cut-away slot 54 as shown in Figure 1.
  • Figure 6A is a rear elevation of the clamp member 36 showing the top layer 60, the intermediate layer 62 and the slot for the lever 44 and the bottom layer 64 with the slot 66 for the peg 68 which prevents the lever from falling out of the member 36.
  • the slot 66 should be of sufficient width to prevent undue pressure on the peg 68. Screws 72, 74, 76 secure together three layers of the clamp jaw 36.
  • Figure 6B is a plan view of the clamp jaw 36 with the top layer 60 and layers 44, 46 removed to reveal the slot 66 and the cutaway region forming slot 52.
  • Figure 6C is a plan view of the lever 44 indicating the peg 68 and a workpiece receiving hole 78 formed therein for receiving a peg for engaging one of the holes 14.
  • Figure 6D is a corresponding side elevation of the lever 44 and peg 68 and peg receiving opening 78 associated therewith.
  • Figure 6E is a plan view of the assembled jaw 36 showing the securing screws 72, 74, 76 which fix together the layers 60, 62, 64.
  • stop member 38 may be constructed in the same way as jaw 36 (using a linkage as shown in Figure 1) so that at the expense of the loss of the single-handed action, the two secondary clamping jaws 36, 38 can be moved parallel to the length of the jaws 10, 12 when both the handles 32 and 34 are rotated.
  • Figure 7 is a perspective view of the clamp jaw 36 when fitted to the right hand end of a clamping workbench having movable main jaws 10 and 12.
  • the bifurcated end of lever 44 includes two jaws 80 and 82 which are adapted to snugly fit and embrace the opposite sides of a rectilinear head of a peg stop generally designated 84 fitted into the right hand end outer hole of the set of holes 14 (see Figure 1) .
  • a similar peg stop 86 is shown waiting to be fitted into the corresponding hole 87 in jaw 12. This shows more clearly the rectilinear head 88 and the cylindrical peg 90 of the peg stop. Peg 90 is a tight fit in the hole 87.
  • the lever 46 is most simply attached to the peg stop 86 by pivoting the lever 46 until its two end jaws 92 and 94 straddle the hole 87 whereupon peg stop 86 can be dropped into position with the head 88 aligned with the parallel inside faces of the jaws 92, 94 and pushed down into the hole 87.
  • the peg stops such as 84, 86, 96 and 98 may be formed from injection moulded plastics material or from metal or timber.
  • the levers 44 and 46 likewise may be formed from metal or wood, but preferably are formed from injection moulded plastics material .
  • the workpiece engaging face of the supplementary clamping jaw 36 is preferably formed from the timber but the rest of the member may be formed from plastics, metal or timber as desired.
  • the supplementary clamping jaw 36 is retained in position by means of the restraining member 56 secured below the underside of the two jaws 10 and 12 by means of the support 58.
  • the restraining or retaining member 56 preferably extends symmetrically below both of the clamping workbench jaws 10 and 12 but it has been found sufficient for it to extend to either the left or the right of Figure 2 so as to extend below one or other of the two clamping jaws only to serve the necessary purpose .
  • FIG. 8 An alternative and preferred arrangement is shown in Figure 8 which the retaining/restraining member 56 of Figure 7 is replaced by a small rotatable member 100 attached to the lower end of a rotatable pin 102, the upper end of which carries a serrated knob 104 to allow member 100 to be rotated through at least 90°, if not through 360°.
  • the member 36 is then simplified m that it is only necessary to rotate knob 104 until the retaining member 100 is generally perpendicular to the longer dimension of the clamping aw 36 to permit member 100 to be lowered between the aws 10 and 12 of the clamping workbench after which rotation of the knob 104 through 90° locates the protruding arm or arms of the member 100 below one or both of the clamping aws 10 and 12.
  • the supplementary clamping jaw 36 can therefore be fitted quickly and easily to the mam clamping jaws 10 and 12 by simply rotating the retaining member 100 so as to be perpendicular to the clamping jaw 36, adjusting the two levers 44 and 46 so that the pegs 110 and 112 align with the two holes in the two workbench clamping jaws 10 and 12 mto which they are to be fitted, pushing both pegs 110 and 112 mto the respective holes and thereafter rotating the knob 104 to secure the supplementary clamp jaw 36 m position.
  • Figures 9A ana 9B The simplicity of the arrangement is shown m Figures 9A ana 9B .
  • the supplementary clamping jaw 36 is shown with the retaining member 100 rotated perpendicularly thereto which enables the clamping jaw 36 to be lowered into position on the two clamping jaws 10 and 12, and
  • Figure 9B shows the retaining member 100 shown rotated through 90° and now in hidden detail entirely below the item 36 and the clamping jaws 10 and 12, thereby retaining the supplementary jaw 36 in position above the two main clamping jaws 10 and 12.
  • the levers 44 and 46 are not shown in Figures 9A and 9B .
  • the arms 44 and 46 may be made of resilient springy material to enable the member 36 to be fitted in position as shown in Figure 7 after which each of the levers 44 and 46 can be forced in an upward direction so that each of the pegs clears the upper surface of the workbench clamping jaws 10 and 12 and the levers are limited until the pegs 110 and 112 align with the holes into which they are to fit, after which then can be forced down into the holes.
  • the fit between the inboard ends of the levers 44 and 46 and the clamping jaw 36 may be sufficiently sloppy to accommodate up and down movement of the levers 44 and 46 sufficient to allow the pegs 110, 112 to clear the upper surface of the clamping jaws 10 and 12 of the workbench to allow the pegs to be moved into position and inserted into the selected holes.
  • Figure 10 shows an alternative arrangement in which relative movement between two clamping jaws 10 and 12 is translated into movement perpendicular thereto utilising cooperating inclined surfaces.
  • two channel section members 114 and 116 each having a channel 118 and 120 respectively are adapted to be fitted to the opposite inner edges of two clamping work jaws 10 and 12 (such as shown Figure 1) with the j aws entering the slots 118 and 120 respectively.
  • the opposing faces of the two members 116 and 118 are inclined relative to the direction of the slots 118 and 120 and are adapted to permit sliding between the two members 114, 116 and sprmg means diagrammat cally shown at 122 clamps the two members 114, 116 together but m such a way that the sprmg force is less than the force of sliding friction between the two inclined surfaces of the members 114, 116 when the two said members are in aligned relationship with the surfaces perpendicular to the slots 118, 120 m substantial alignment.
  • the direction of action of the spring means 122 is such that if opposite forces are applied to the two members as by moving the jaws 10 and 12 towards each other by means of the drives 32, 34 the spring means becomes extended and there is a restoring force tending to align the two members 114, 116 m the event that the handles 32, 34 are unwound and the jaws 10 and 12 moved outwardly.
  • the slots 118, 120 therefore remain clamped over the internal edges of the two clamping jaws 10 and 12 as they are moved outwardly, at least until a position s reached at which the two parts 116 and 118 become transversely aligned.
  • Face plates 124 and 126 are fitted to the larger ends of the two members 114 and 116.
  • faceplate 124 is attached to the rear face of the member 114 as shown and faceplate 126 (shown detached from the assembly) is attachable to the face 128 of the member 116. Attachment may be made by means of adhesive or more likely by means of rivets or screws.
  • the faceplates serve two purposes.
  • the members 114 and 116 may extend significantly beyond the ends of the members 114 and 116 so as to entrap the device on the workbench jaws to prevent the device from falling through the gap between the workbench jaws 10 and 12 if they are accidentally opened to a too great an extent.
  • the entrances to the slots 118 and 120 may be made slightly divergent so as to prevent any tendency for jamming between the upper corners of the inwardly facing edges of the workbench jaws 10 and 12 and the slots 118 and 120 in the event that they become disengaged.
  • peg stops which may be conventional peg stops or modified peg stops as described herein fitted into holes selected from two groups of holes 14 and 16 so as to position the device shown in Figure 10 at a desired position along the length of the workbench jaws.
  • a similar device may be located albeit oppositely handed so as to provide another movable jaw at another position between the two main jaws 10 and 12 or peg stops which may be simple standard peg stops or modified peg stops as described herein may be fitted into other holes selected from the groups 14 and 16 and positioned and spaced from the faceplate 126 or 124 as appropriate so as to engage the opposite end of a workpiece clamped between them and the appropriate faceplate of the device shown in Figure 10.
  • the two parts of the device shown in Figure 10 may both be similar in shape and size and therefore may both be moulded from the same injection mould.
  • the angle between the two members may be more or less acute than that shown in the drawing. Selecting different angles will alter the displacement of one part relative to the other for unit movement of the clamping jaws 10 and 12 and will also determine the translation of force exerted by the drives 28 and 30 in the perpendicular direction through which that movement is translated by the device shown in Figure 10. The angle is therefore selected accordingly.
  • spring means is only shown at the top of the device shown in Figure 10, similar spring means may be provided on the underside of the device or the spring means may be located midway between or incorporated into cavities formed in the two members 114, 116 during their manufacture and typically facing each other across the cooperating inclined f ce.
  • Figure 11 shows an alternative arrangement in which the clamping jaw 36 is in the form of a right-angled channel 130, the upright wall 132 of which comprises the workpiece engaging face and the horizontal face 134 of which is adapted to overlie the workbench jaws 10 and 12.
  • Workbench jaw 12 is shown partly cut away and workbench jaw 10 is shown in dotted outline so as not to hide details of the structure of the supplementary clamp 130.
  • Channel 130 is held in position by two devices.
  • the first is a fixed right-angled clamping retaining member 136 which is secured to the underside of face 134 and may be formed from a vertical wall 138 and a horizontal plate 140 which is adapted to slidingly engage the underside of jaw 10.
  • the other device is a pivoted lever generally designated 142 which is formed from bent steel rod or the like and includes a short upper arm 144, and a longer lower arm 146, the outboard end of which is bent slightly to form a foot which is adapted to engage in a ratchet surface, part of which can be seen in the cut-away region of clamping jaw 12 at 148 and which is at the base of a groove formed along the inboard face of jaw 12 as seen at 150 at the right hand end of jaw 12 in Figure 11.
  • a pivoted lever generally designated 142 which is formed from bent steel rod or the like and includes a short upper arm 144, and a longer lower arm 146, the outboard end of which is bent slightly to form a foot which is adapted to engage in a ratchet surface, part of which can be seen in the cut-away region of clamping jaw 12 at 148 and which is at the base of a groove formed along the inboard face of jaw 12 as seen at 150 at the right hand end of jaw 12 in Figure 11.
  • a block 152 is mounted within the right-angled channel 130 and a cylindrical bore 154 accommodates a generally straight section of the rod between the shorter arm 144 and the longer arm 142.
  • a spring 156 joins the end of the shorter lever arm 144 to a point 158 on the block 152. The action of the spring is to rotate the arm 144 and therefore the arm 146 in the direction of the arrow 160 and fitting the device shown between the clamping jaws 10 and 12 requires the arm 146 to be rotated in an opposite sense against the action of spring 156 to reduce the overall distance between the outboard end of lever arm 146 and the restraining member 136.
  • the device can be fitted at any point along the length of the clamping j ws 10 and 12 and can be readily located and relocated relative to the jaws by simply squeezing the arm 146 towards the member 136 so as to disengage the end of the arm 146 from the ratchet 150, and sliding the assembly relative to the jaw 10 until the member 132 is in the desired position.
  • FIG 11 can be used in conjunction with fixed peg stops such as are normally supplied with a clamping workbench such as the WORKMATE, modified peg stops such as described herein or an elongate end stop such as 38 in Figure 1, or an adjustable stop such as shown at the right hand end of Figure 1 in the form of a supplementary clamping jaw 36.
  • a supplementary jaw such as shown in Figure 11, may be mounted in a reverse sense to that shown so that its clamping surface faces that of member 130 at the appropriate distance to receive a workpiece therebetween. Adjusting the clamping jaws 10 and 12 so as to move them together will cause the channel members of each of the supplementary clamping jaws to move towards the other and firmly clamp the workpiece therebetween.
  • Figure 12 shows in a scrap section part of the slot containing the ratchet 150 in the inboard face of the workbench jaw 12.
  • two rod members 142A and 142B may be provided operating through two spaced apart vertical drillings 154A, 154B to cooperate with two ratchets, one provided on each of the inboard faces of the two clamping jaws 10 and 12.
  • Two ratchets are identified by reference numerals 150A, and 150B.
  • the spring may now be arranged between the two shorter ends 144 and 144B and to this end the spring is denoted by reference numeral 164.
  • Upstanding pads 166 and 168 facilitate the pushing apart of the two levers so as to disengage the two outboard ends of 142A and 142B from their two ratchets respectively.
  • the supplementary clamping jaw is held in place on the jaws 10, 12 by a T-bar, comprised of a horizontal T-bar 143 joined to the underside of member 130 by an upright leg 145.
  • a T-bar comprised of a horizontal T-bar 143 joined to the underside of member 130 by an upright leg 145.
  • the device shown in Figure 13 operates in exactly the same way as that shown in Figure 11 and can cooperate with different stops at the opposite end of a workpiece it is to engage in exactly the same way as described in relation to Figure 11.
  • FIG. 14 This comprises an elongate frame generally designated 170 formed from two longer angled sections 172 and 174 and two equal shorter end sections 176 and 178.
  • the internal spacing between the two longer elements 172, 174 is equivalent to the width dimension of the clamping jaw 10. This permits the frame 170 to be fitted over jaw 10 and the end struts 176 and 178 rest on the ends of the jaw 10 and retain the frame in position thereon.
  • elongate member 174 is formed with ratchet teeth some of which are designated 180, 182, 184, for engagement by the outer end of a lever arm such as 142 of the device shown in Figure 11.
  • a similar member is located over the other clamping jaw 12 with the ratchet face of the other frame facing the ratchet face 174 of the unit 170 retained on clamping jaw 10.
  • Screws or clamps or spring flaps may be employed to retain the frame or frames on the clamping jaw or jaws.
  • clamping jaw 10 is shown in dotted outline below the frame 170 in Figure 14.
  • FIG. 15 A modification of the arrangement shown in Figure 14 is shown in Figure 15.
  • ratchet teeth 186 are formed along the narrow bridging section 188 of a channel member designated 190 havmg an upper plate 192 and a lower plate 194 spaced apart by the thickness of a clamping jaw such as 10.
  • Holes 196 and 198 are formed m the upper plate 192 similar in size and spacing to holes such as the inner line of holes 14 in clamping jaw 10 of Figure 1 to allow retaining pegs 200, 202 to be pushed through the holes 196, 198 and through aligned holes selected from the sets of holes 14 m Figure 1 so that the ratchet faced member is located at a desired position along the length of the workbench aw.
  • a second pair of holes aligned with 196 and 198 may be formed the lower plate 194 such as shown at 204 m relation ro hole 198 so that the pegs 200 and 202 can be pushed completely througn both plates as well as the clamping bench jaw 10.
  • the length of the channel 190 is commensurate with the length of the workbench aw 10 so that the ratchet teeth 186 will extend along the whole length of the clamping jaw 10.
  • a similar device albeit rotated through 180° may be fitted to the opposed clamping bench jaw 12 in a similar manner.
  • FIG. 16 A further modification is shown m Figure 16 in which an elongate metal or plastics strip generally designated 206 and formed in its external face with a ratchet profile 208 s shown secured to the inboard edge of workbench jaw 10 by means of two screws 210 and 212.
  • the ratchet profile 208 may be dispensed with and particularly if the elongate strip 206 is formed from hardened plastics material or metal, the ratchet profile may be replaced by a plurality of equally spaced notches, apertures, holes or indentations mto whicn the end of the lever arm 142 can fit and be trapped.
  • ratchet teeth or apertures or other indentations are contmuous along the whole length of the strip 206, one or more regions may be left devoid of such teeth, apertures or indentations through which further screws can be fitted to more securely retain the strip 206 on the face of the workbench jaw.
  • Figure 17 illustrates an alternative form of peg stop incorporating one of the aspects of the invention.
  • the stop is shown upside down Figure 17A and is shown fitted with its peg in one of the openings of a workbench jaw 12 m Figure 17B.
  • the peg stop comprises a cylindrical peg 214 extending from a flat underside surface 216 of a rectangular block 218.
  • the peg and block are formed integrally as by plastics injection moulding.
  • the peg may be a hollowed cylinder or a solid cylindrical member and the rectangular block 218 may be partly hollow or itself may be solid.
  • the distinguishing characteristic of the device is that the peg 214 extends asymmetrically from the surface 216 nearer to one end than the other. This means that when inserted in a cylindrical hole such as one of the holes 16 in the jaw 12, it can be rotated relative to the hole and workbench jaw 12 and in doing so, after each 90° rotation will present a different face as an end stop as viewed along the length of the jaw 12. Because of the asymmetry, the offset of the workpiece engaging face from the axis of the hole through which the peg 214 is fitted will differ.
  • the peg 214 is mounted asymmetrically in two dimensions so that it is noc midway between either of the two pairs of faces 222 and 226 on the one hand, and 220 and 224 on che other, then four different offsets can be obtained by careful selection of the position of the peg 214 in relation to the face 216. In this event, rotation of the block 218 through 360° will allow four different offsets to be obtained, depending on which of the faces 220, 222, 224 and 226 is presented to the workpiece.
  • the peg stop shown in Figure 17 may be used in conjunction with similar peg stops located in three other openings in the two workbench jaws 10 and 12, two peg stops in each of the jaws, and considerable variation in distance between workpiece engaging faces of the blocks can be obtained by locating blocks in different ones of the holes and rotating the blocks as required.
  • Figure 17 can be used in conjunction with any of the movable supplementary clamping devices such as 36 shown in Figures and those shown in Figures 10, 11 and 13.
  • Figures 18A, 18B and 18C illustrate how a peg stop having one degree of asymmetry in which the peg is mounted equidistant between the two longer faces 222 and 226, can be rotated into three different positions to present three different working distances between the workpiece engaging face of the block 218 and a fixed end stop 228.
  • Figure 19 illustrates a preferred secondary clamp which comprises an elongate supplementary clamp jaw 230 adapted t ' o rest perpendicularly across the main jaws 232, 234 of a clamping workbench having drive means (not shown) for moving the main jaws 232, 234 towards and away from each other in manner known per se .
  • the jaw 230 includes a slot 236 which receives one end of an arm 238 which is held captive in the slot for pivoting and sliding relative to the jaw. Typically it is held in place by pin 240 the ends of which are received in two aligned slots in the upper and lower faces of the jaw 230, one of which is denoted by reference numeral 242.
  • the other end of the arm 238 has a peg 244 for fitting into one of the peg stop receiving openings 246 in one of the main jaws - jaw 232 as shown.
  • Beneath the jaw 230 is an L-shaped retention device having a leg 248 and a foot 250. The latter extends parallel to the jaw 230 and the latter can be slid in the direction of arm 252 so as to engage the edge 254 of the jaw 234.
  • Figure 20(A) shows the leg 248 and foot 250 of the retention device of Figure 15, in more detail.
  • a spacer 256 is trapped between the lower end of the leg 248 and a washer 258, the assembly of foot 250, spacer 256 and washer 258 being secured in place by one or more screws or bolts 260.
  • Figure 20(B) shows the foot 250 located further away from the - underside of the jaw 230 by locating the spacer 256 between the end of the leg 248 and the foot 250.
  • the foot and spacer are secured in place by means of one or more screws or bolts 260 and washers 258.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)

Abstract

La présente invention concerne des mâchoires supplémentaires (36) destinées à être installées sur un établi, transversalement par rapport aux mâchoires principales (10, 12) en une position espacée par rapport à l'élément de butée (38) situé à l'autre extrémité des mâchoires principales (10, 12). Selon la présente invention, le fonctionnement du dispositif d'entraînement (32, 34) qui déplace les mâchoires principales (10, 12) l'une vers l'autre ou les éloigne l'une de l'autre augmente la distance entre les mâchoires supplémentaires (36) et l'élément de butée (38) lorsque ledit dispositif est actionné dans un sens, et réduit la distance entre les mâchoires supplémentaires et l'élément de butée lorsque ledit dispositif est actionné dans l'autre sens. Un établi de serrage peut être équipé d'une mâchoire supplémentaire (36) et d'une butée fixe (38) pour le serrage d'une pièce entre ladite mâchoire et la butée, au-dessus des mâchoires de serrage principales (10, 22). Alternativement, deux mâchoires de serrage supplémentaires peuvent être installées sur les mâchoires principales (10, 12) de manière à produire des mouvements opposés en réponse à un mouvement relatif des mâchoires de serrage principales (10, 12).
EP98952868A 1997-11-22 1998-11-06 Dispositif de serrage pour un etabli Withdrawn EP1032488A1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
GBGB9724648.2A GB9724648D0 (en) 1997-11-22 1997-11-22 Clamping device
GB9724648 1997-11-22
GBGB9819801.3A GB9819801D0 (en) 1997-11-22 1998-09-14 Clamping device
GB9819801 1998-09-14
PCT/GB1998/003329 WO1999026765A1 (fr) 1997-11-22 1998-11-06 Dispositif de serrage pour un etabli

Publications (1)

Publication Number Publication Date
EP1032488A1 true EP1032488A1 (fr) 2000-09-06

Family

ID=26312637

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98952868A Withdrawn EP1032488A1 (fr) 1997-11-22 1998-11-06 Dispositif de serrage pour un etabli

Country Status (5)

Country Link
US (1) US6416046B1 (fr)
EP (1) EP1032488A1 (fr)
AU (1) AU1041699A (fr)
GB (1) GB2331481B (fr)
WO (1) WO1999026765A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000064643A1 (fr) * 1999-04-21 2000-11-02 Hayday, Cynthia Dispositif de serrage
US7499090B2 (en) * 2005-01-27 2009-03-03 Datalogic Scanning, Inc. Rolling-reset imager with optical filter
US20090107367A1 (en) * 2007-10-31 2009-04-30 Stephen Edward Smythe Portable power tool rest
CN107901333A (zh) * 2017-12-27 2018-04-13 合肥创佳汽车电器有限公司 一种注塑自动锁螺母机
CN111618803B (zh) * 2020-05-09 2023-03-14 北京大龙东升门窗幕墙工程有限公司 一种窗户的窗框生产装置及其生产方法
CN114750120A (zh) * 2022-04-06 2022-07-15 河北比智智能科技有限公司 多功能构件固定装置
CN117260152B (zh) * 2023-11-17 2024-02-02 山西中德铝业有限公司 一种铝型材加工用同步转动焊接装置

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GB778369A (en) * 1954-05-19 1957-07-03 Alwin Franz Device for the orthogonal assembly of window or picture frames and the like
GB2012201B (en) * 1978-01-12 1982-02-10 Black & Decker Mfg Co Workbenches
US4352489A (en) * 1979-05-29 1982-10-05 Black & Decker Inc. Small compact lightweight portable vise suitable for use by model makers and hobbyists
US4497477A (en) * 1980-10-29 1985-02-05 Morton Glass Works Apparatus for cutting glass into various shapes
US4527786A (en) * 1982-07-30 1985-07-09 Hsu Wen C Workbench
US4648585A (en) * 1985-06-07 1987-03-10 Yang Tai Her Vise structure having articulatable vise jaws
US4647028A (en) * 1985-08-19 1987-03-03 Yang Tai Her Versatile clamping assembly for workbench or the like
GB2193663A (en) * 1986-06-10 1988-02-17 Peter Naughton Jackson A transverse clamp
GB2254033B (en) * 1991-03-09 1994-06-29 Alan Alexander Lamont Clamping method and apparatus
GB2267674A (en) * 1992-06-11 1993-12-15 Yang Tai Her Clamping work table
EP0685284A1 (fr) * 1994-06-03 1995-12-06 Li-Lin Chang Table à scie avec dispositif à serrer des pièces

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See references of WO9926765A1 *

Also Published As

Publication number Publication date
GB9824243D0 (en) 1998-12-30
GB2331481A (en) 1999-05-26
GB2331481B (en) 2002-09-04
WO1999026765A1 (fr) 1999-06-03
AU1041699A (en) 1999-06-15
US6416046B1 (en) 2002-07-09
GB2331481A9 (en)

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